a vertex
This length (diagonal) = sq.rt ( l2 + b2 ) where 'l' is length of the rectangle and 'b' is the breadth of the rectangle.
Hmm. Just place a ruler so one edge is at one corner and then swing the ruler around to the opposite corner and read the distance.Is that what you meant?Answer 2 Why don't you just put a ruler from...
there isnt
Adjacent corners of a square share one side. Opposite corners share no sides.
measure one side of the square then multiply by 1.414 ex. a 10 in. square will have a corner to corner length of 14.14 in.